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Downsides of high FC

What, if any, are the downsides of keeping a high FC?

For example, with my CYA, the pool calculator suggest a FC range between 4.0-8.0. Would there be any disadvantages to bringing it up to 10 or 11 at night? That way, when my pool uses 3ppm, it will go down to 7 or 8 by the following night. I like the idea of doing this, because it protects my FC from going too low by nighttime.

Re: Downsides of high FC

The amount of chlorine used up by sunlight is a percentage of your starting level. A higher starting level means more chlorine used by sunlight. Chlorine used keeping the pool sanitary will be the same either way.

Re: Downsides of high FC

Let me see if I can try to explain (hope my thinking is right here) sunlight burns the chlorine at a certain rate...the more chlorine you have in the pool as a percentage of your pool water the more chlorine you will burn.

Re: Downsides of high FC

To add to what dmanb2b said, all of the chlorine is exposed to sunlight. If there is more chlorine then more chlorine is exposed to sunlight. Chlorine breaks down at some rate when exposed to sunlight (the rate depends on the CYA level and the intensity of the sunlight). All of the chlorine will be breaking down at the same rate, so more chlorine means more of it breaks down.